I came across this one myself again in http://dragonshobbies.com/games/cote/map.php?gameid=50. This time the movement was interrupted after landing in my home territory. I'll have to look into it more. If you come across this, please hold off completing your movement phase and let me know.
Bug report: Problem with ship movement. Ship was not able to move after just one space. Checking the db records, the previous location is the same as the current location. May have been an issue with double-clicking or long loading page. A similar issue affected units before that were moving on land, but I believe that had been corrected.
To players: Until this bug is fixed, if this issue is noticed on your turn, please wait on making any further actions in your turn temporarily and notify me to make adjustments to the record.